Weekly pre-release

Improvements

• SSSE3 support
• Aarch64 neon support
• FlipADST
• Additional asm tests (CDEF, Inverse transform).
• Make sure all the dependencies are using the same version of syn, reducing the overall build time.

Changes

• The nasm feature had been renamed asm.

Fixes

• Unbreak C-API building on rust 1.38 and later.